> For the complete documentation index, see [llms.txt](https://docs.xplorpay.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.xplorpay.com/guides/mobile-emv/clearentwrapper/start-transaction.md).

# Start transaction

You can process payments using:

* Card reader (recommended)
* Manual card entry

### Card reader transaction

{% code title="" overflow="wrap" lineNumbers="true" %}

```swift
let saleEntity = SaleEntity(amount: 22.0, tipAmount: 5)
ClearentWrapper.shared.startTransaction(
    with: saleEntity,
    isManualTransaction: false
) { error in
    // Handle completion
}
```

{% endcode %}

#### Runtime callbacks

During the transaction, the SDK provides updates through delegate methods:

{% code title="" overflow="wrap" lineNumbers="true" %}

```swift
func userActionNeeded(action: UserAction) {
    // Prompt user (for example, insert or swipe card)
}
func didReceiveInfo(info: UserInfo) {
    // Display status (for example, processing)
}
```

{% endcode %}

#### Transaction result

{% code title="" overflow="wrap" lineNumbers="true" %}

```swift
func didFinishTransaction(
    response: TransactionResponse?,
    error: ClearentError?
) {
    if error == nil {
        // Transaction succeeded
    } else {
        // Handle error
    }
}
```

{% endcode %}

### Manual card entry

Use manual entry when a reader is unavailable.

{% code title="" overflow="wrap" lineNumbers="true" %}

```swift
let saleEntity = SaleEntity(
    amount: 22.0,
    tipAmount: 5,
    card: "4111111111111111",
    csc: "999",
    expirationDateMMYY: "11/28"
)
ClearentWrapper.shared.startTransaction(
    with: saleEntity,
    manualEntryCardInfo: true
) { error in
    // Handle completion
}
```

{% endcode %}


---

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